Apparatus for concentrating liquids.



APPARATUS FOB CDNCENTBATING LIUUIDS.

(Application led Oct. 25, 1898.)

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Patented Dec.' 3, I90I. E. SHAW. APPARATUS FOR GUNCENTBATING LIQUIDS.

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6 Sheets-Sheet 2.

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lllllilililll 4 vin or No. 533,206. Paten-ted nec. 43, |901.

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APPARATUS FOR CNCENTRATING LIUUIDS.

(Application med ont. 25, dass.)

6 Sheets-Sheet 3.

(Nn Model.)

271 ven/[or No. 688,206K Ptented Dec. 3, 190|.

E. SHAW.

APPARATUS FOR CONCENTRATING LIGUIDS.

(Application led Cet. 25, 1898.) (No Model.) 6 Sheets-Sheet 4.

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Patented D ec. 3, |90I.

' E. SHAW.

APPARATUS` FOR CDNGENTRATING LIUUIDS.

(Application led Oct. 25, 1898.)

6 Sheets-Sheet 5.

(No Model.)

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Patented Dec. 3, l90l.

N0. 688,206. E. SHAW.

APPARATUS FOR CONCENTRATING LIUlDS.

(Application med Oct. 25, 189B.)

6 Sheets- Sheet 6.'

(No Model.)

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i TTED STATES PATENT OEEICE.

EDWARD SHAW, OF LONDON, ENGLAND.

APPARATUS FOR CONCENTRATING LIQUIDS.

SPECIFICATION forming part of Letters Patent N0. 688,206, dated December3, 1901. Application filed October 25, 1898. Serial No. 694,550. (Nomodel To @ZZ whom, it may concern:

Be it known that I, EDWARD SHAW, a subject of the Queen of Great Britainand Ireland, residing at Broad street, London, England, have inventedApparatus for Ooncentrating Liquids, of which the following is aspecification.

The object of my present invention is to cook syrup in its passagethrough a tube to some fixed predetermined degree. Having a xedsteam-pressure, and therefore a constant predetermined temperatureoutside of the tube, the required results can be obtained only by havingcontrol over the rate at which the syrup passes through the tube. Inorder to prevent any variation of the pressure inside of the tubeaffecting the speed of the pump or other pressure-feeding device, andtherefore the flow of the syrup through the tube, 1 introduce anartificial load between the pressure-feeding device and the tube ofsufficient magnitude to enable the pump or pressure-:feeding device towork steadily irrespective of the said variations of pressure in thetube, which always occu rs. This artificial load is further of greatimportance should there be a vacuum in the tube, as it prevents thepressure of the atmosphere driving the syrup through the pump orpressure-feeding device into the tube, an effect which may result evenwhen the pump is working.

The accompanying drawings illustrate a construction of apparatusaccording to this invention which is suitable for cooking or boilingsyrup for use in the manufacture ot' sweetmeats.

Figures 1 and 2 are elevations at right angles to each other of theentire apparatus. Fig. 3 is a vertical section of the cooking-coil andcollecting-chamber on line 3 3 of Fig. l. Fig. 4 is a horizontal sectionof the saine. Fig.

5 is a sectional view of the valve controlling the Withdrawal of vaporfrom the collectingchamber; and Figs. G, 7, and 8 are respectively asectional end elevation and two side elevations, with parts removed, ot'means for imparting motion to the said valve.

l is a tank containing untreated liquid, hereinafter referred to assyrup 2 is a pump by which the syrup is fed to the cooking-coil 3, whichis contained Within a dome-shaped chamber 4,charged with steam forheating the coil 3. The coil 3 discharges into a collecting-chamber 5,that is also contained within the steam-chamber 4 and the upper portionof which is connected by a pipe 6, provided with a valve 7, to ajet-condenser 8, which communicates with an air-pump 9. The chamber 5has a discharge-passage 10, that is controlled by an outwardly-openingvalve 11, normally kept against its seat by `a spring ll", or it may beby a weight or by has been discharged the valve'7 is again operated soas t0 reestablish communication between the chamber 5 and the condenserand air-pu mp, thereby causing the pressure in said chamber to bereduced below that of the atmosphere and the valve 1l tobe again closed.The valve 7 may be operated periodically in any convenient way; but inthe example illustrated the feed-pu mp 2 is provided with means(illustrated in Figs. 6, 7, and 8) forimparting motion to the valve 7.These means comprise a couple of ratchet-wheels 12 13, which are drivenby pawls 14, carried by levers 15, that are rocked by tappet-levers 16,and tappets on the piston-rods of the pump. The ratchet-wheels carrydriving-studs 12 13, that come into contact with pins or abutments 17 onopposite sides of the fulcrum of one of two levers 18a 18h, that arecoupled together by a stirrup-piece 19, that is connected by a rod orlilik 2O with the spindle of the valve 7. The arrangement is such thatthe valve is opened and closed at the required times. If desired, thevalve 1l may be arranged to be similarly operated at the required timesinstead of operating automatically.

The collecting-chamber 5 is arranged inside the steam-chamber 4, so thatthe steam which supplies heat for cooking the syrup may also IOO serveto maintain the temperature of the cooked syrup and the steam or vaporcontained in the chamber 5.

The chamber 4 is detachably connected by bolts to a base-plate 4, sothatit can be readily lifted and the coil 3 and collecting-chamberexposed for inspection or repair. The baseplate 4a has cast on its upperside a circular rim 4c, into which the copper cylinder forming thechamber 5 is brazed. Itis also formed with a passage 40, leading fromthe coil 3 to the chamber 5, and with a passage 4, by Which the pipe 6,Whose upper end opens into the upper partvof the chamber 5 and isprovided with a baffle-plate 6 to prevent the entry of bubbles of syrup,is placed in communication with the condenser.

4e and 4f are passagesor apertures through the base-plate 4, throughwhich syrup and steam, respectively, are supplied to the coil 3 and tothe chamber 4.

The outlet 10 is at the bottom of a depression or Well formed in thebase-plate 4: and in which the syrup collects. The seat of the valve 1lis formed with an inwardly-extending portion, that serves to support thevalvespindle and its spring 11a, as shown, the arrangement heing suchthat the seat and Valve 'can be secured into and out of the base-plate.

The condenser is preferably formed in thecolumnsupportingthecooking-chamber. In order to prevent the syrup beingforced through the feed-pump 2 and cooking-coil 3 by the pressure of theatmosphere when the pressure in the collecting-chamber 5 is reduced, thedischarge-pipe 2 of the feed-pump is provided with a suitably-loadedValve 2, that Will only open when the pressure against it exceedsatmospheric pressure. The rate of vfeed is thus capable of beingcompletely controlled by the feed-pu mp 2 and is not intluenced bythevvacu um in the cooking-coil and collecting-chamber.

4 In the operation of the apparatus the syrup that is to be cooked isplaced in the vessel or receiving-chamber 1, and passes from thencethrough a pipe extending from the bottom thereof to the pump 2. From thepump 2 it is forced through the pipe 2, past the valve 2b, which is aresistance member for placing a load upon the said pump, and from thenceon through the pipe2a into the cooking-coil 3, located Within thechamber 4. The syrup in passing through the cooking-coil is cooked andis delivered into the lower end of the separating-chamber 5, from whichit is delivered through the pressure-controlled liquid-escape opening 10upon a table or other receiving member 12.

1. A syrup-cooking apparatus comprising an. externally-heatedcooking-tube, a syrupfeed tube forming a continuation of saidcooking-tube, and a constantly-acting resistance member situated in saidfeed-tube at a point in advance of the cooking-tube, substantially asdescribed.

2. A syrup-cooking apparatus comprising an externally-heatedcooking-tube, a syrupfeed tube forming a continuation of saidcooking-tube, a pressure-feeding device in communication with saidfeed-tube, and a constantly-acting resistance member in said feedtubebetween the pressure-feeding device and the cooking-tube, substantiallyas described.

3. A syrup-cooking apparatus comprising an externally-heatedcooking-tube, a separating and discharging chamber in communication Withthe exit of said cooking-tube, means for varying the pressure in saidchamber, a syrup-feed tube forming a continuation of said cooking-tube,a pressure-feeding device in communication with said feed-tube, and aconstantly-acting resistance member in said feed-tube, substantially asdescribed.

Signed at Euston Station,London,England, this 8th day of October, 1898.

EDWARD SHAV.

Vitnesses:

PERCY E. MATTocKs, EDMUND S. SNEWIN.

